Should be 7 feet. 6+6=12 then 26-12=14, divide that by 2 (for the other two sides of the rectangle), you'll get 7 ft. 
        
             
        
        
        
Answer:
Y = 6 and x=6 are perpendicular because they both measure at a 90 degree angle 
 
        
             
        
        
        
Where's the graph? If you can give me the graph then I'd be able to answer for you.
        
             
        
        
        
1.
a^2+b^2=c^2
easy
a=a
b=13
c=21
a^2+13^2=21^2
a^2+169=441
minus 169 both sides
a^2=272
sqrt both sides
a=16.4924
D is answer
2. same thing
a=18
b=26
18^2+26^2=c^2
324+676=c^2
1000=c^2
sqrt both sides
31.6228=c
C is answer
3.
one way is to plug them in
remember that hypotonuse is longest side
A. 7^2+24^2=25^2, is that true?, yes it is treu
answer is A
4. 
legs are 6 and 4
a=6
b=4
c=x
4^2+6^2=x^2
16+36=x^2
52=x^2
sqrt both sides
7.2111=x
7.2=x
5.c=20
a=x
b=14
x^2+14^2=20^2
x^2+196=400
minus 196 both sides
x^2=204
sqrt both sides
x=14.2829
x=14.3
1. D
2. C
3. A
4. 7.2
5. 14.3 
        
             
        
        
        
Answer: 3/8
Step-by-step explanation:
1/2 × 3/4
Multiply the numerators: 1 × 3 = 3
Multiply the denominators: 2 × 4 = 8
I hope this is clear, have a great day.